GINGERINO and the GINGER Project

Séminaire
le 28 sept 2017 de
11h00
à 12h00

Intervenant :
Angela di Virgilio

INFN Sezione di Pisa, Pisa, Italy

Salle Lyot

GINGER (Gyroscopes IN General Relativity) is a proposal aiming at measuring the Lense-Thirring effect with an experiment based on Earth. It is an array of ring lasers, which are the most sensitive inertial sensors to measure the rotation rate of the Earth.
Rotation and angular measurements are of great importance for various fields of science: General Relativity predicts rotation terms originated from the kinetic term, Earth Science studies the Earth's angular velocity and all its variations, the tides and all its perturbations, the normal modes of the Earth, the angular perturbations associated to the movement of the plates, the deformations of hydrological nature, without neglecting the rotational signals produced by the earthquakes. A ring laser integral to the Earth's surface is sensitive not only to the angular rotation of the planet, but also to all the global and local rotational signals to which it is subjected. For this reason GINGER is relevant for geophysics.GINGERINO is a ring laser prototype installed inside the underground laboratory of the Gran Sasso, it has been built in order to validate the laboratory for GINGER. Its typical sensitivity is below 0.1 nrad/s in 1 second measurement. GINGERINO has validated LNGS for GINGER and it is now used for geophysical measurements. It is taking data since May 3 2017, typical data will be shown.